The Affordable Care Act has been mired in controversy since its enactment in 2010. The Supreme Court has on three occasions considered high-stakes challenges involving the Act; President Trump and a Republican Congress tried and failed to repeal it; and expanding the law is now at the center of President Biden's domestic agenda. This seminar will examine the various legal disputes that have erupted around the ACA -- disputes that pertain both to its constitutionality and, more generally, to the legality of the choices that the Obama and Trump administrations made in the course of implementing the law. Classes will include close looks at NFIB v. Sebelius, King v. Burwell, and California v. Texas, as well as the controversy over Medicaid work requirements and pending litigation involving the contraception mandate.